Wrench.



D. B.' HANNAN.

WRENCH. APPLICATION FILED APR.21. 1915.

n0. 1 Ou il o0, 1 P.. p A 4 m m a D1 UNITED sTATEs DENNIS B. HANNAN, OF BALLEEAT, CALIFORNIA., ASSIGNOR OF ONE-HALF TO GEORGE G. HANNAN, OF TOPEKA, KANSAS.

WRENCH.

To all whom it may concern:

Be it known that I, DnNNis B. HANNAN, a citizen of the United States, residing at Ballerat, in the county of Inyo and State of California, haveinvented certain new and useful Improvements in Vrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. i

This invention relates yto wrenches and es pecially to that class of wrenches which may be used as monkey wrenches, and also as pipe wrenches.`

The principal object is to provide a cheap, strong, durable and efficient wrench for use upon nuts, bolt heads and other angular objects which at the same time will be equally effective for use upon pipes and round bars or other similar objects.

A further object is to provide a wrench of the herein mentioned class with means for preventing lateral movement and displacement of the movable jaw.

With these objects in view, the invention consists in the improved construction, arrangement and combination of the parts of a wrench of the character specified, which will be hereinafter fully `described and afterward specifically claimed.

In order that the construction and operation of the inventionmay be readily comprehended, I have illustrated an improved embodiment thereof in the accompanying drawings, and I will now proceed to specifically describe the same, reference being had to said drawings, in which,

Figure 1 represents a sectional view of the movable jaw of the wrench in position upon the stem, said stem, as well as the rigid jaw and the other parts of the wrench, being shown in elevation. Fig. 2 represents ay sectional view on a transverse plane cutting through the stem at the point indicated by the broken line 2-2 of Fig. 1, the movable jaw and other parts of the wrench being shown in elevation. Fig. 3 represents a transverse sectional view taken on the transverse plane indicated by the broken line 3 3 of Fig. 1, and Fig. 4 represents a view similar to Fig. 1 showing a slight modification, the handle bar and lever being broken away.

Like reference characters will be used to speccationrof Letters Patent. Pgwgnted App 1g, 1916.

Applatn led April 21, 1915.

Serial No. 22,848.

indicate the same parts wherever they occur in a plurality of figures of the drawings.

Referring specifically to the drawings, 5 indicates the stem or main handle bar of the wrench which carries at its outer end the usual stationary jaw 6 and passes through an opening 7 in a movable jaw 8, said movable jaw being provided with a tooth 9 adapted to be engaged in any one of the transverse notches 10 on the inner surface of the handle bar 5 to hold the movable jaw in any position to which it may be adjusted upon said handle bar. The opening 7 in the movable jaw 8 is larger than is necessary to simply provide for the sliding of the jaw upon the handle bar, the additional space in the opening 7 being provided to accommodate the forward end 11 of the bar 12 which is mounted upon a pivotal pin 13 passing through the sides of the opening 7 of said movable jaw. The forward end of the bar 12 is bent at a slight angle from the main body of said bar, forming a fulcrum 14 which rests upon the surface of the main bar 5. A spring 15 is secured to the end wall of the opening 7 of the movable j aw 8 by means of suitable fastenings such as rivets or bolts indicated at 15a, said spring projecting beyond the opening 7 of the jaw 8 and beyond the fulcrum 14 of the bar 12 and resting upon said bar 12 beyond said fulcrum so as to have a.

tendency to press the main body of the bar 12 into contact with the main bar 5 and to press the movable jaw in a. direction to cause and maintain the engagement of its tooth 9 with one of the notches 10 in said main bar.

'Ihe inner face of the bar 12 is hollowed out as at 16 to fit over the curved face 17 of the bar 5 so that when said bar 12 is pressed down upon the bar 5, to the position shown in Figs. 1 and 3, the projecting edges 18 of the inner face of the bar 12 engage over the sides or corners of the bar 5 preventing any lateral displacement of said bar 12, which might interfere with the proper engagement of the fixed and movable jaw with the article being operated upon. The position illustrated in Fig. 1 is an operative position and when it is desired to adjust the movable jaw on the bar 5, the bar 12 is raised at its outer end while the spring 15 keeps the fulcrum 14 in contact with the bar 5. The eXtreme outer end of the bar 12 will be pressed inward toward the bar 5, carrying the movable jaw with it and disengaging the tooth 9 from the notch 10 in the bar 5 with which said tooth has been engaged. The movable jaw may now be adjusted longitudinally upon the bar 5 and the tooth 9 engaged with another notch 10 of said bar 5, when by releasing the bar 12 the pressure of the spring 15 will cause the outer end of the bar to rise and press the tooth into the notch, thereby insuring the holding of the movable jaw in its adjusted position. The general outline of the face of the two jaws is flat so that the wrench may be used upon objects whose `sections are parallelograms, but a portion of each of these surfaces may be provided with teeth 19 whereby the wrench may be used with equal facility upon articles having curved surfaces, such as pipes and round bars, as well as articles having an irregular Surface.

In Ithe modified construction illustrated in F ig. 4 the stationary jaw 6, main handle bar 5, and sliding jaw 8 are substantially the same asin the construction herein before described but the spring 15 is dispensed with and the teeth on the face of the movable jaw are omitted. The tooth 9at of the movable jaw and the notches 1011 of the main bar are made triangular instead of rectangular, as in the construction of Fig. 1. The lever 12a is pivoted at 13a in the movable jaw and is` provided with'a head 20 having a nose 21 which has a camlike action on the main handle bar 5 to press said handle bar against the bottom 22 of the opening 7 in the movable jaw to cause the tooth 9a to engage in one of the notches 10a.

rIhe simplicity, economy and durability of the construction herein described will be obvious and while I have specifically described this construction, I hold that many changes and variations may be made .there` 1n, within the scope of the claim, without departing from the spirit and scope of thel invention.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent of the United States 1sz- A wrench of the character described, comprising a main bar carrying a fixed jaw andl having' transverse notches in the lower face thereof, a movable jaw mounted upon the bar and provided with a tooth adjacent its forward edge, adapted to engage said notches, a lever bar pivoted at its forward end within an opening in the movable jaw above the main bar, the pivot of said lever being positioned adjacent the forward edge of the movable jaw and substantially opposite the tooth of said movable jaw, said lever bar being bent to form a fulcrum for contacting with the edge of the main bar, the fulcrum point being adjacent the rear edge of the movable jaw, a spring fixed within the opening of the movable jaw adjacent the forward edge thereof and projecting rearwardly out from and engaging the lever bar rearwardly of its fulcrum point, whereby downward pressure will be directed against the free end of the lever bar, said lever bar extending' the entire length of the main bar and being hollowed out on its inside face to receive the edge of the main bar and to prevent lateral dis-` placement thereof.

In testimony whereof I have signed my name to this speciiication in the presence of two subscribing witnesses.

DENNIS B. HANNAN.

Witnesses JOHN P. DUNN, L. J. BEAGLE.

Copies ofthis patent,` may be obtained for ve cents each, by addressing the Commissioner of Patente, Washington, D. 

